Door-lock.



UNITED STATES PATENTv OFFICE.

WILLIAM J'. DUNN, 0F MONTREAL, QUEBEC, CANADA.

DOOR-LOCK.

Specification of Letters Patent.

Patented Apr. s, 1913.

Application led April 4, 1916. Serial No. 553,373.

'door latches and the object is to provide an inexpensive and durablelatch lock which may be applied to a door with great ease j door toreceive the lock and to bore a holel and rapidity.

At the presenttime, the method of applying mortlse latches or locks todoors is to cut a deep, narrow recesslin the edge of the through thedoor, intersecting this recess, for the latch spindle. A second mortiseis cut in the door jamb to receive the latch. Considerable di'licultyand loss of time is experienced in fitting the lock into this recess andin attaching the lock, handle plates, etc., to the door and door jamb bymeans of screws. This invention aims to overcome these disadvantages byproviding a latchlock which may be inserted without the use of screwsand without the necessity of forming the usual large recess in the edgeof the door.

The device consists of a spring bolt inclosed in a cylindrical tube andconnected to a removable spindle by a air of pivotally mounted links.Inside and) outside handles are provided, the latter of which is looseon the spindle and connected thereto by a sliding bar controlled from ahelically grooved sleeve on the shank of the inner hand/le. A lockbarrel is provided in the outside handle whereby a suitable key may beused to rotate tha spindle to open the door from the outs1 e.

In the drawings which illustrate my inventiony-Fi ure 1 is a verticalsection is bored through the door near the edge thereof and a secondhole 15 is bored in the edge of the door so as to connect with the hole14. The usual handle lates 16 are provided on each side of the oorcovering the ends of the hole 14 and forming bearings for the inside andoutside handles 17 and 18 respectively. These plates are provided with aplurality of integral spikes 16 projectin rom their inner surfaces. Thelatch spind e 19 connecting the two handles is preferably round andprovided with a radial slot 20 extending from the inner end of thespindle to a point within the shank of the outside handle 18. The innerend of the spindle is also bored out to form a tubular portion 21adapted to contain the cylindrical end 22 of the kspindle latch 23, theblade 24 of the latch lying in the slot 20 in the spindle. The outsidehandle 18 is loosely mounted on the spindle 19 so that it is free toturn thereon. This handle is revented from coming ol" the spindle by ali-shaped pin 25 which is inserted throu h one of a pair of slots 26 inthe shank 0% the handle and is ada ted to engage a circumferentialgroove 27 ormed on the spindle, as shown in Fi s. 1 and 5. A smallportion 28 of the han le shank projects through the plate 16 into thehole 14 in the door and is provided with a slot or notch 29 for thereception of the blade 24 of the spindle latch 23. It will be readilyseen that when the blade of the spin- Adle latch en ages in the slot 29of the outside handle, the andle wil?` be rigidly connected to thespindle and when turned will rotate the s indle, but that when the blade24 is with rawn from the slot 29, the handle will be disconnected fromthe spindle in so far as the rotation of the spindle is concerned.

In order that the spindle may be rotated from the outside when theoutside handle is disconnected, I provide a lock barrel 30 locatedcentrally in theoutside handle 18. It will be noted in Fig. 1 thatthespindle 19 extends through the shank of the outside handle andapproximately half waythrough the handle itself., The lock barrel 30 atits outer end is flush with the surface of the handle and at its innerend 31 is tubular and is revolubly mounted on the projecting extremityof the spindle 19. The lock barrel is independently revoluble withrespect A'to the spindle but is held longitudinally rigid by a U-shapedmember 32 engaging a groove 33 in the spindle, similarly to that' shownin Fig. 5. A key aperture 34 is formed eccentrlcally through the barrel30 and a similar aperture 35 is formed in the end of the spindle and isadapted to register with the aperture 34 in the barrel. A center pin 36may be located in the spindle aperture 35. A small recess 37 is formedinthe key a ert-ure for the reception of a ward on the ey in order thatthe key may.

readily turn the barrel 30. In order that the key apertures 34 and 35may be always in line to allow the easy insertion of the key, I providea small helical spring 38 connecting the lock barrel and the spindle.This spring is preferably located in a shallow circumferential groove 39formed in the spindle within the tubular portion 31 of the barrel. Oneend of this spring is fixed to the spindle and the other end to thebarrel, the spring being wound loosely three or four turns in the groove39. Thus whichever direction the barrel is turned on the spindle, thespring is distorted and when the barrel is released the spri returns toits normal condition and rotates t e barrel sufficiently to aline the keapertures 34 and 35.

The inside end of t e spindle is provided with a. fine screw thread andthe shank of the inside handle is internally threaded with acorresponding thread, so that the handle may be screwed out of the sindle. A longitudinal slot 40 is formed 1n the shank of the insidehandle and the shank is surrounded b a loose sleeve 41 having therein ahelical s ot 42 extending approximately half around the sleeve. A pin-43 passes through the sleeve and shank slots 42 and 40, and is forcedinto the cylindrical portion 22 of the spindle latch 23. By rotating thesleeve 41 on the handle shank the pin 43 is forced to movelongitudinally of t-he spindle, by reason of the pitch of the helicalslot 42, and thereby moves the spindle latch so that the blade 24thereof engages or disengages the slot 29 in the shank lof the outsidehandle.

The latch which holds the door closed is located in the hole 15 andcomprises a cylindrical tube 44 of suitable length inserted in the hole15. This tube 44 1s rovided at the inner end with an internal an e 45,and at the outer end with an external ange 46 which prevents the tubebeing drawn through the hole 15 when the latch is o erated. The latchbolt 47 is cylindrica in form and rovided with a beveled outer end 48 int e usual manner. A horizontal slot 49 is formed in the latch boltextending a suitable distance from the inner end and this slot iscrossed at the. inner end of the bolt, by a pin 50. A small crank disk51 is located on the spindle 19, and 'is held a inst revolution thereonbythe blade 24 o the spindle latch which pro.'ects beyond the circuference of the `s in le and acts as a key, a seen in' Figs. land 3. Ashort 05 thereof loutwardly turned, passes through' Urshaped pin 5 2having the extremities 53 apertured extremities 55 of the link. A

helical spring-56 of suitable strength is located in the tube 44 andslight-ly compressed between the inner end of the latch olt and theflange 45 of the tube.

The latch plate on the door jamb 13 is replaced in this invention by ashort tube 57 of the same diameter as the tube 44 and having an externalflange 58 at the outer end similar to the flange 46. This tube 57 isforced into a shallow hole 59 bored in the door jamb.

When mounting the latch on a door, the holes 14 and 15 are bored in thedoor, as previously described, and the holeV 59 is bored in the doorjamb in such a position as to register with the hole 15. The two handleplates 16 are then placed in position to cover the ends of the hole 14,the spikes 16a holding them against revolution. The latch tube 44containing the latch bolt and spring and carrying the crank disk 51, isthen driven into the hole 15 until the outer end thereof is flush withthe edge of the door, as seen in Fig. 2. The short tube 57 is alsodriven into the hole 59 in the door jamb in the same manner. The outsidehandle 18 carrying the latch spindle is placed in position, the spindlebeing passed through the disk 51. The spindle latch 23 is next insertedso that it keeps the disk 57 to the spindle and enters the slot 29 inthe shank of the outside handle to hold the spindle a ainst revolutioninde endently of the outside handle. The insidie; handle 17 carrying thesleeve 41 on its spindle is now screwed on to the threaded inner end ofthe'spindle a sufficient distance. The inside handle is adjusted unt-ilthe slot 40 in the shank thereof registers with the slot in the spindle,and the pm 43 is then passed throu h the helical sleeve slot 42 andslots in the andle shank and spindle and driven into the cylindricalportion of the spindle latch. By reason of the fine threads on thespindle, the handles may be adjusted to turn easily without there beingenough slack motion to cause rattling. It will be easily understood fromFig. 1, that when the pm 43 is in place it holds the inside handleagainst revolution on the spindle s that when the handles are onceadjusted they cannot work either tight or loose. `It will be seen inFigs. 1 and 2 that the shanks of both handles are shouldered at 60 andthat these shoulders bear against similar shoulders 61; below thesurface of thel plates 16, in the usual manner. l y

The operation of the latch is very lsimple. As long as the blade 24re'mains in the slot is forced back by its beveled end engaging 29 ofthe outside handle, the latch may be operated in the usual manner byeither' handie. lVhen it is desired to make the door openable from theinside only, the sleeve 4l is rotated to withdraw the blade 24 of thespindle latch from the slot 29 of the outside handle. The outside handlethen rotates freely on the spindle but will not ,turn the same tooperate the latch, while the inside handle remains fixed to the spindle.lVhen the spindle is turned by' either handle it carries the disk 5].with it so that the latch bolt 47 is drawn back through the medium otthe pin 52 and link 54, compressing the spring 5G, as will be readilyunderstood from Figs. 2 and 3. Then the outside handle is disconnectedfrom the spindle the latch may be operated by means of a suitable keyinserted in the key apertures 34 and 35 which connects direct-ly withthe spindle and will rotate the spindle when turned. The pin 36 in thekey aperture 35 in the spindle is for the purpose of prevent-ing theintroduction ot' any instrument, other than the proper key, to rotatethe spindle. Any such instrument introduced in the key aperture 3l ofthe lock barrel, will be inellectual, as the barrel revolvesindependently of the spindle and outside handle. 'lhe pin connecting theoutside handle to the spindle is kept in place when the latch is mountedon a door by the flange G2 of the outside handle plat-e 16. When thedoor is closed without turning the spindle, the latch bolt the jambplate. The bolt recedes and compressesthe spring but does not yoperatethe rest of the mechanism as the pin 50 moves between the arms of thelink and the slot 49 in the -bolt vprevents the bolt from shifting thelink, as -will be seen m Figs. 2 and 3.

No screws are used in assembling the parts ot the latch nor in attachingthe same to a door. Moreover, 'che tedious operation of mortisng a .lockrecess in. the door and a latch recess in the door jamb is eliminated,as these recesses are replaced by simple auger holes which may be madewith great ease and accuracr .in a `few seconds, and which do not wearen the door and Vjamb as do the mortised recesses. Furthefmore, thereis no keyhole to be made or keyhclc plateV to be adjusted. The latch issimple in construction and not liable to get broken or out of order, andmay be manufactured at small cost.

Other advantages will be obvious to those skilled in the art to whichthe invention relates.

Having thus described my invention, what I claim is 1. In a latch lock,a revoluble spindle, an inside handle rigid therewith, an outside handlerevolubly mounted of. said spindle, a disk mounted on the spindlebetween said handles, a latch, a link connecting the lato-L and disk, abar holding said disk and outside handle against revolution on thespindle, and a revoluble sleeve on the inside handle for shift-ing saidbar to allow the outside handle free revolution on the spindle.

2. In a latch lock, a slotted spindle, an inside handle mounted at oneend thereof, an outside handle revolubly mounted at the opposite end ofsaid spindle, a. disk mounted on the spindle between said handles, alatch, a link connecting the disk and latch, a bar mounted in ,saidspindle slot holding the disk and outside handle against revolution, apin carried by said bar holding the inside handle against revolution onthe spindle, and a revoluble sleeve on the inside handle engaging saidpin for shifting the bar to allow the outside handle free revolution onthe Spindle.

3. In a latch lock a revoluble spindle, a handle at each end thereof, acrank disk mo'unted on the spindle between said handles, a tube, aslotted latch bolt slidable therein, a pin crossing the rear end of saidslot, a U-shaped pin in the periphery of said 1disk having theextremitles thereof outwardly turned, a U-shaped link hooked around thebolt pin and naving the extremities thereof pivotally mounted on theoutwardly turned extremities of the disk pin,

and a helical spring in the tube compressible on the retreat of the boltIn witness whereof I have hereunto set my hand in the presence of tvowitnesses. WILLIAM J. DUNN. Witnesses:

STUART R. W. AMEN, E. R. McKENzm.

